I'm stuck on which version of the 9800 Pro to get. I want a card that can run HL2 smoothly. I've been doing a lot of research but can't seem to find the right card. Which version of the 9800 Pro will do well with hl2 and such games. And how can i find out my comp's power supply so i can install such a card. and should i install another fan to for the card. thanx